12088021 has 6 divisors (see below), whose sum is σ = 13286966. Its totient is φ = 10989000.

The previous prime is 12088019. The next prime is 12088033.

12088021 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 81796 = 3465^2 + 286^2 .

It is not a de Polignac number, because 12088021 - 2¹ = 12088019 is a prime.

It is a super-2 number, since 2×12088021² = 292240503392882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12087983 and 12088001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12088001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49830 + ... + 50071.

Almost surely, 2^12088021 is an apocalyptic number.

12088021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12088021 is a deficient number, since it is larger than the sum of its proper divisors (1198945).

12088021 is an equidigital number, since it uses as much as digits as its factorization.

12088021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99923 (or 99912 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 12088021 is about 3476.7831396278. The cubic root of 12088021 is about 229.5012570278.

It can be divided in two parts, 1208 and 8021, that added together give a palindrome (9229).

The spelling of 12088021 in words is "twelve million, eighty-eight thousand, twenty-one".